Water → HCID 57752488, compound

Participants

Reaction Steps

A solution of hydroxyl-sulfonamide 5 (77 g, 0.30 mol) in pyridine (730 mL, 9.5 vol) was cooled to <10° C. in a 2 L round bottom flask. Tosyl chloride (56.6 g, 0.30 mol) is added to the solution over 5 minutes maintaining the internal temperature below 10° C. The reaction was allowed to warm to room temperature with stirring overnight. The completed reaction was poured into water (10 vol, 770 mL) to give an orange solution which was extracted with iPrOAc/MTBE (1:1, 2×1.5 L). The combined organics were washed with brine (2×500 mL), aqueous HCL (2M, 2×500 mL) then brine (1×500 mL). The organic portion was dried (Na2SO4), filtered and evaporated to give sulfonate 6 as an orange oil (78 g).

Provenance & Evidence